代码调用外部HTTP请求接口-蒲公英云

代码调用外部HTTP请求接口

转载链接样例：https://www.cnblogs.com/guxiong/p/6661272.html
https://zhidao.baidu.com/question/627561819246516844.html

package net.ninehkj.logistics.util;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.apache.http.NameValuePair;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
 *     调用HTTP接口返回数据
 * @author Administrator
 *
 */
public class InterfaceUtils {
    @Resource
    private CloseableHttpClient  httpClient;
    /**
     * Post请求(此方法会返回字符串)
     * @param payUrl    路径
     * @param param        请求数据
     * @return
     * @throws UnsupportedEncodingException 
     *     将map集合转换为json字符串
     * JSONObject jsonObject = JSONObject.fromObject(map);
     */
    public static String JSONPostHttpCallOtherInterfaceUtils(String payUrl, String json) throws UnsupportedEncodingException {
        /**
         *     创建Httpclient对象
         */
        CloseableHttpClient  httpClient = HttpClients.createDefault();
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String result = "";
        try {
            /**
             *     创建HTTP请求并放入请求地址
             */
            HttpPost httpPost = new HttpPost(payUrl);
            if(!"".equals(json)) {
                /**
                 *     将数据放入UrlEncodedFormEntity会自动将数据编码为合适内容
                 */
                StringEntity requestEntity = new StringEntity(json, "utf-8");
                requestEntity.setContentEncoding("UTF-8");
                /**
                 * 给httpPost设置JSON格式的参数
                 */
                httpPost.setHeader("Content-type", "application/json");
                httpPost.setEntity(requestEntity);
                /**
                 * 发送HTTP请求获取返回值
                 */
                result = httpClient.execute(httpPost, responseHandler);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }
        return result;
    }
    /**
     * Post请求
     * @param payUrl    路径
     * @param param        请求数据
     * @return
     * @throws UnsupportedEncodingException 
     */
    public static String PostHttpCallOtherInterfaceUtils(String payUrl, Map<String, String> param) throws UnsupportedEncodingException {
        /**
         *     创建Httpclient对象
         */
        CloseableHttpClient  httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String result = "";
        try {
            /**
             *     创建HTTP请求并放入请求地址
             */
            HttpPost httpPost = new HttpPost(payUrl);
            if(null != param) {
                /**
                 *     此集合用于存储传送的数据
                 */
                List<NameValuePair> list = new LinkedList<NameValuePair>();
                for (String key : param.keySet()) {
                    /**
                     *     遍历map中的参数放入集合中
                     *     BasicNameValuePair对象中传入参数该map的key和当前key对应的value值
                     *     为什么使用BasicNameValuePair，因为我们在下面使用UrlEncodedFormEntity
                     *     对BasicNameValuePair数据进行编码时只能接受List<? extends NameValuePair>
                     *     为参数。链接：https://blog.csdn.net/zdb292034/article/details/80663792
                     *     
                     */
                    list.add(new BasicNameValuePair(key, param.get(key)));
                }
                /**
                 *     将数据放入UrlEncodedFormEntity会自动将数据编码为合适内容：param1=value1¶m2=value2
                 *     如果内容不规范，可以使用StringEntity
                 */
                UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list);
                httpPost.setEntity(urlEncodedFormEntity);
                /**
                 *     进行HTTP请求
                 */
                response = httpClient.execute(httpPost);
//                httpClient
                /**
                 *     执行http请求
                 */
                result = EntityUtils.toString(response.getEntity(), "utf-8");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(null != response) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }
}